What is true of an element of atomic number 15 that has an isotope of mass number 32? (There could be more than one correct choice. )
A)The number of protons in the nucleus is 15.
B)The number of neutrons in the nucleus is 15.
C)The number of protons in the nucleus is 32.
D)The number of nucleons in the nucleus is 47.
E)The number of neutrons in the nucleus is 17.

Question

Quizplus · Accepted Answer

An element with atomic number 15 has 15 protons. The mass number is the sum of protons and neutrons, so with a mass number of 32, the number of neutrons is 32 - 15 = 17.

What Is True of an Element of Atomic Number 15